A 22-year-old pregnant woman has been shot dead in south-west London.
A post-mortem examination is due to take place on Saturday
The victim, who has been named as Krystal Hart, was found in the hallway of a flat in Belleville Road, Battersea, at 1110 BST.
She had suffered a single gunshot wound and was pronounced dead by paramedics at the scene.
Scotland Yard said officers were investigating the possibility that the shooting was connected with a dispute over parking.
Police have said they want to speak to a white man aged between 30 and 50 in connection with the shooting.
Det Ch Insp Colin Sutton, who is leading the investigation, told BBC News 24: "There had been some pretty low-level dispute between this unfortunate victim and her neighbour and it may be that that's got some bearing on what happened, but certainly nothing in the past has happened here of this magnitude."
Police are talking to Miss Hart's partner and her neighbour as witnesses.
Mr Sutton said officers would be reviewing CCTV footage from a camera on the building.
"We are hopeful that that will show us exactly what events took place."
Mr Sutton said it appeared that two shots were fired and one hit the 22-year-old, injuring her fatally.
"This is a truly, truly horrific crime. We've got a young girl, 22 years old, pregnant, shot down in her own home. I can't begin to describe how awful that is, " he said.
Police have appealed for anyone who was in the area at the time of the shooting to contact them.
A post-mortem examination is due to take place on Saturday and the area has been cordoned off.
It has been confirmed that Miss Hart was three months pregnant.
Her stepfather, Clive Lawrence, told BBC News 24: "She was looking forward to being a mum... full of joy.
"It was only last weekend we were out buying all little baby bits."
Local people described their shock at the shooting.
One man, who gave his name only as Glen and lives two roads from where the shooting took place, said the area was not used to violent crime.
"Not in this part - maybe on the other side of Clapham Junction where there are some big estates but not here," he said.
"Here it is young professional couples and generally quite a well-to-do area."
Another local man, who only gave his name as Rory, said: "Northcote Road, which is nearby, is known as Nappy Alley because it is full of mums in 4x4s (or) walking with prams."
He said the road was once a market but was now full of fashionable cafes and boutiques.
This incident follows the shootings of five other south Londoners, three of them teenagers, in February this year.
All the victims were male.